Replace a file input with a dropzone (for an image) in Laravel 4.x

DropzoneController.php

<?php

class DropzoneController extends BaseController {

	public function upload() {

		$r = Util::uploadUnique('file', Config::get('website.dropzone_uploads'));
		extract($r);

		//return response
		return [
		    'filename' => $uniqueFolder . '/' . $filename,
		    'path' => $path,
		    'img' => '<img src="' . $path . $uniqueFolder . '/' . $filename . '" alt="image" />'
		];

	}

}

example.blade.php

{{HTML::dropzone('blog_image', 'Image', $post->blog_image)}}	

{{HTML::dropzone('blog_image', 'Image')}}	

global.php

///...

HTML::macro('dropzone', function($name, $label = null, $value = null)
{
    //maybe it's already been submitted?
    if (!empty(Input::old($name))) {
        $value = Input::old($name);
    }

    $img = (!empty($value)) ? '<img src="' . Config::get('website.dropzone_uploads') . $value . '" alt="image" /> ' : '';

    $str = '<div class="form-group">
                <label class="control-label col-lg-2 col-sm-4">' . $label . ' </label>
                <div class="col-lg-10 col-sm-8">
                    <div class="row dropzone-field">
                        
                        <div class="col-md-6">
                            <div class="dropzone-upload dropzone spot" style="min-height: 160px;" data-file="' . $name . '" data-path="' . Config::get('website.dropzone_uploads')  . '"></div>
                        </div>
                        <div class="col-md-6">
                            <div class="dropzone-preview">
                                ' . $img . '
                            </div>
                        </div>
                    </div>
                </div>
            </div>' . Form::hidden($name, $value);

    return $str;
});

// ...

script.js

Dropzone.autoDiscover = false;

$(".dropzone-upload").dropzone({
    url: "/path-to/dropzone-uploads",
    paramName: "file",
    autoProcessQueue: true,
    uploadMultiple: false,
    maxFiles: 1,
    maxFilesize: 2,
    dictDefaultMessage: "Drop files to upload (or click)",
    init: function() {
    var myDropzone = this,
        $element = $(this.element),
        $wrapper = $element.parents('.dropzone-field').first(),
        $preview = $wrapper.find('.dropzone-preview');
        name = $element.data('file'),
        path = $element.data('path');
        this.on("success", function(file, response) {
          $preview.html(response.img);
          $('input[name="' + name + '"]').val(response.filename);
          this.removeAllFiles()
        });
    }
});

Util.php

<?php namespace App\Services;

use Illuminate\Support\Facades\Facade;

class Util extends Facade
{
  
  public function uploadUnique($key, $path)
    {
    	$uniqueFolder = base_convert(strtotime('now'), 10, 36);

    	if (is_string($key)) {
        $file =  \Input::file($key);
      } else {
        $file = $key;
      }

      $filename = $file->getClientOriginalName();
    	$uploadPath = public_path() . $path;

    	$file->move($uploadPath . '/' . $uniqueFolder , $filename);

    	return [
    		'filename' => $filename,
    		'uniqueFolder' => $uniqueFolder,
    		'path' => $path
    	];
    }
  
}